Map matching for security applications

Abstract

An apparatus for map matching between a measured position for an object and information on a digital map is specified. This involves a computation unit being used to perform a first selection of cartography elements on the map on the basis of the measured position and on the basis of a predefined error. In addition, the computation unit is designed to provide the selected cartography elements for a first and a second secondary computation unit. In addition, values from the secondary computation units are converted in the same unit of measurement.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a continuation application of application Ser. No. 12 / 601,889, filed Nov. 25, 2009, which is a the U.S. national phase application of PCT international Application No. PCT / EP2008 / 055850, filed May 13, 2008, which claims priority to German Patent Application No. 102007025065.9, filed May 29, 2007 and German Patent Application No. 102008023242.4, filed May 13, 2008, the contents of such applications being incorporated by reference herein.FIELD OF THE INVENTION[0002]The invention relates to the calculation of position data for an object. In particular, the invention relates to an apparatus for aligning a measured position for an object with information on a digital map, for a system, to the use of an apparatus, to a vehicle, to a process, to a program element and to a computer-readable medium.BACKGROUND OF THE INVENTION[0003]Safety-relevant vehicle assistance systems need to be capable of predicting dangerous situations w...

AI Technical Summary

Benefits of technology

This patent describes a system that uses GPS and map data to help vehicles navigate through tunnels or underground passages. The system has a module that can determine its position even when GPS signals are blocked. It uses a combination of methods to estimate its position, such as measuring distances and analyzing vehicle sensors. The system can also make decisions based on information from other sensors, like cameras or accelerometers. Overall, the technology helps improve the accuracy and reliability of navigation in challenging conditions.

Problems solved by technology

This forecast capability has previously been provided by various types of sensors, radar systems or cameras, but these are all limited to the direct field of vision of the vehicle.

This means that they are not able to provide any information about what happens after a bend, for example.

The GPS or another positioning system has an error which does not always allow a position to be indicated accurately on a road.

Furthermore, a map may also always have some accuracy errors and discrepancies from the actual cartography, which makes the position-finding directly on a road more difficult or even impossible.

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